William james chubb



(No Model.)

W. J. GHUBB. APPARATUS THROUGH WHICH AIR IS SUPPLIED TO FURNACES OFSTEAM BOILERS.

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\VILLIAM JAMES OHUBB, OF LONDON, EBIGLAND, ASSIGNOR TO THE VULOAN PATENTSMOKE CONSUMER LIMITED, on SAME rLAcn' AND FUEL EOONOMIZER CORPORATION,

APPARATUS THROUGH WHICH AIR IS SUPPLIED T FURNACES OF STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 448,178, dated March10, 1891.

Application filed June 80, 1890. gerial No. 357,288. (No model.)Patented in England May l6 1884, No. 7,782; in France August 22,1884,11'0. 163,891; in Belgium'f'ebrnary 15, 1888, No. 80,861; in Capeof Good Hope March 3, 1888, No. 8, and in Austria-Hungary May 9, 1888,No. 6,999 and No. 17,413.

To aZZ whom it may concern.-

.Be it known that 1, WILLIAM JAMES Cause,

a subject of the Queen of Great Britain and Ireland, and a resident ofLondon, in England, have invented certain Improvements in A-pparatusThrough which Air is Supplied to the Furnaces of Steam-l3oilers, (forwhich I have obtained a British patent, No. 7 ,7 82, dated May 16, 1884;a French patent, No. 163,891, IO dated August 22, 1884:; a Belgianpatent, No. 80,661, dated February 15, 1888; a Cape of Good Hope patent,No. 6, dated March 3, 1888, and Austro-I-Iungarian patents, No. 6,999and No. 17,413, dated May 9, 1888,) of which the x 5 following is aspecification.

My invention relates to apparatus for offecting in the furnaces ofsteam-boilers a more perfect combustion of the fuel and of the gasesarising therefrom, thereby economizin g the consumption of fuel andpreventing the formation of smoke.

This apparatus consists of a tuyere or f unnel-shaped passage, which mayextend entirely across the fire-box or furnace-chamber,

and air is drawn into the tuyere from below the fire-bars and dischargedthrough one or more narrow months in such wise as to mingle with theunconsumed gases and smoke that are making their escape from thefurnace, whereby the desired more perfect combustion is effected. Ashitherto constructed, the apparatus, and especially the delivery mouthor months thereof, has very speedily been so damaged by the heat of thefurnace 5 as to become useless, and either the whole apparatus must berenewed or the delivery mouth or months thereof must be recreated andreformed.

Now the object of this my invention is so to construct and fit theapparatus that it shall not be so liable to be damaged and rendereduseless by the heat of the furnace, while any renewal or repair that maybe required can easily, quickly, and cheaply be effected, and I carryout this object by forming that part of the apparatus, especially thedelivery mouth or months thereof, on which the heat of the furnace willchiefly play of fire-brick or other similar and suitable material, whilethe metal part of the apparatus is so formed as properly to carry thisfire-brick or material 011 the one hand, and on the other hand as easilyto be secured to the walls of the firebox or furnace-chamber, orotherwise to be placed in position.

In the front end of the fire-box A, I fit a I tuyere B, which preferablyextends entirely across the fire-box and is made of metal. One side ofthe tuyere is formed in the shape of a bent plate O, and the other sideforms a mid-feather D, on which lugs E maybe fitted 7o to support thefire-bars F. This tuyere B is secured to the lower parts of the walls ofthe fire-box A in any convenient manner, and to the lower and preferablylarger entrance mouth G thereof, which is on alevel with the bottoms ofthe fire-bars F, or thereabout, may be fitted the hinged plate 11,actuated by the lever and red I to regulate the admission of the air.The metal parts of thetuyere 13, or that is to say the plate 0 and themid- 8o featherl), are so formedit may be, as shown in Fig. 1that one ormore blocks L, of firebrick, fireclay, or other similar and suitablematerial of the required shape, can be held and secured in suitableseatings made there- 8 5 for in such wise that in or by the one or moreblocks L is or are created the one or more delivery1nouths K, which maybe horizontal, as shown in Fig. 2, or may be bent or curved upward ordownward, as may be dcsired, and the front web D of the mid-feather Dmay also be faced with fire-brick or other material, if necessary, ormay be entirely removed and replaced by the fire-brick or material. Thusin this apparatus part of the 5 air entering the front of the ash-pan Mis section 60 caught by the plate II, and passing through the mouth G isforced along the tuyere B, thence issuing through the mouth or mouths K,and,mixing with the unconsumed gases and smoke arising from the fuel inthe firebox, insures a more perfect combustion, while, as the intenseheat of the furnace does not play upon the metal, but on the fire-brickor similar material,the delivery mouth or months of the tuyere will notbe blocked up or closed, though when any renewal or repair is requiredit can easily, quickly, and cheaply be effected. lVhen, as is perhapsmost convenient, the metal part of this tuyere is made in one piece, itcan be secured in position by the bolts N. Again, when the front web Dof the mid-feather D is removed and replaced by the fire-brick ormaterial it is very convenient to make a number of holes in the otherweb of the mid-feather to allow the heat of the fire-brick or materialfreely to pass into the tuyere B and highly heat the air passingtherethrough. Again, the mid-featherD may be made entirely of thefire-brick or other material aforesaid and no metal at all be usedtherein, excepting, perhaps, if necessary or desirable, a transversebaror stretcher below the level of the fire-bars to support the same.Again, when there are two or more delivery-mouths K they may be arrangedat different levels, or may be formed to cause the streams of airissuing therefrom to traverse the fire-box in different directions andat different angles. Again, when the 1000- motive is intended to travelwith either end foremost instead of the hinged plate H a sliding platemay be fitted.

In marineand other boilers I can, if and when required, employ fans orother usual appliances to force a strong draft through the tuyere.

This apparatus, it is evident, can be used in and with all such boilersas havea square, or rectilinear or a high fire-box or furnacechamber orcombustion-chamber, and .in all cases is placed in such proper positionin relat-ion thereto as to cause or allow the stream or streams of airthat has or have passed through the tuyere to mingle with theunconsumed, gases and smoke arising from the furnace, and it may besecured in such position in any usual or other manner, as may be desiredin each case.

I claim as my invention and desire to secure by Letters Patent- 1. In atuyere or apparatus through which air is supplied to the furnace of asteamboiler, the combination of the plate C and mid-feather D, of metal,with the block or blocks L, of fire-brick or other similar material,fitted to the upper ends of the said plate and mid-feather,substantially as-and for the purpose specified.

2. In a tuyere or apparatus through which air is supplied to the furnaceof a steamboiler, the combination of the plate 0, of metal, with themid-feather D and block or blocks L, of firebrick or other similarmaterial, fitted to the upper ends of the said plate and midfeather,substantially as and for the purpose specified.

- In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses.

XVILLIAM JAMES CHUBB. Witnesses:

J AS. HART, JosEPH E. MOORES.

